Almanac: Moss Hart on the “rules” of theater

“The frivolity with which all theatrical activity is conducted has one consoling feature–there are no rules of behavior that apply regularly to any part of the theatre. There is nothing that one can say about acting, writing, producing or directing that cannot be revoked in the next breath. Nothing is immutable. The logic of one year is a folly of the next.”
Moss Hart, Act One